There could be several reasons why your furnace is blowing cold air:
-
Thermostat Settings: Check if your thermostat is set to heat mode and at the desired temperature. Sometimes, the settings might be incorrect, causing the furnace to blow cold air.
-
Dirty Air Filter: A clogged or dirty air filter can restrict airflow, causing the furnace to overheat and shut off the burner, leading to the circulation of cold air.
-
Pilot Light or Ignition Issues: If you have a gas furnace, the pilot light or ignition system might be malfunctioning, preventing the furnace from producing heat.
-
Faulty Thermocouple or Flame Sensor: A malfunctioning thermocouple or flame sensor can cause the gas supply to shut off, preventing the burner from igniting and producing heat.
-
Issues with the Blower Motor: Problems with the blower motor or its controls can result in the circulation of unheated air.
-
Blocked Air Vents or Ducts: Blocked vents or ducts can obstruct airflow, causing the furnace to distribute cold air.
-
Fuel Supply Problems: For gas furnaces, issues with the gas supply, such as low gas pressure or a closed gas valve, can prevent the furnace from producing heat.
It's essential to address these issues promptly, but if you're unsure or uncomfortable troubleshooting, it's best to contact a professional HVAC technician like,Glors Heating and Air Conditioning Inc. to inspect and repair the furnace.
